Warehouse-door.



No. 788.761. PATENTED MAY 2, M305.

` J. BRWOOD.

vWARIHEIUSE DOOR.

APPLIUATIOR FILED ma. 1, um.

PTENTED MAY 2, 1905.

2 BUSTE-SHEET 2.

UNITED i STATES Patented my s, 1905.

JOHNERWOOD, CHICAGO, ILLINOIS.

wanaHouse-noon.v

SPECIFICATION forming part of Letters Patent No. 788,761, dated May 2, 1905.

Application lled August 1,1904. Serial llo. 219,140. l

To all whom t may concern:

Be it known that I, JOHN Enwoon, a citizen of the United States, residing at Chicago, in the county of Cook and State of Illinois, have .invented new and vuseful AImprovements in WerehouseDoors, of which the following is a specification. reference being had to the aceompenyingd rawings, forminga part thereof.

This invention relates to warehouse-doors, and is designed as an improvement or modification of the warehouse-door shown in my application, Serial No. 149,959, filed March 28, 1903. now pending and allowed in the Patent Ofce. p

It consists of the features of construction set out in the claims.

In the drawings, Figure 1 is a perspective view of my improved door shown at open position; Fig. 2 is a section'at a vertical piane transverse to the wall on which the door is hung,rshowing the door in edge elevation at nearly closed position. Fig. 3 is a plan view, on an enlarged scale,a portion of the door being broken away at. the middle.A Fig. 4 is adetail section of the guiding devices at the foot of the lower section of the door, section being made at the plane of the line 4 4 on Fig. 2.

Fig. 5'is a detail section at the line 5 5 on Fig. 4. Fig. 6 is a detail side elevation of the fitting and guiding devices at the foot of the lower section of the door, showing the door in elevated position. Fig. 7 is a detail section at the line 7 7 un Fig. 2. v

This door is rnaatde in two sections, an opper and a lower, hingedtogethex: at a longitudinal horizontal line, the lower section being preferably longer than the upper section by about the thickness of the door. The upper section is hinged to the horizontal bar 3, which is guided on vertical rods 4, 4, rigidly vmounted upon l the wall in which is the doorway, which the door closes. Upon the upper side of said horizontalbar 3, ap' roxxnately in line-With each lateral edge oftb a pulley 8, and to the ceiling or overhead aupport there are secured in line directly above said pulleys -8 8, respectively alleys 9 Y 9. Adjacent to the pulley 9 at the le hand side,

andpreferably, for convenience, journsled inv the bracket, is a guide-pulley 9', and in e door, there is mounted suitable position-with vrespect to the pulley 9 at the right hand there is mounted a. doublegroove guide-pulley 10. At the opposite lateral edges of the lower section of the door, at the foot, there is mounted a tracking pulley or wheel 11, for which a guideftrack '12 isxprovided on the wall parallel with the vertical edge of the doorway. The pulleys 11 are preferably mounted in fittings 13, secured to the lower. corners of the door. :Each of the lifting-cables 15 and 16 lis connected at the lower ends to a link 14, which is pivoted to' the corner-fitting ,13 about midway in the thickness of the door and about as far from the lower edge ashall said thickness, and the link i4 has a lug 14 projecting into a short of the guide-rail 12, so that as the door approaches the floor it is engaged positively `with the'wall by thelengagement of the lug lug I4* in the channel of thebar 12. The

y cable 15 at the righ t-hand side passes up along the edge of the door, through an aperture 17 in the plate 3, over the pulley 9, and thence Vdown about. th'e pulley 8 and up over the pulley 10 and thence down to the Weight i8. The other cable, 16, passes up over the pulley 9 at the left-hand side of the door, down about the pulley 8 at that side, and thence up over the pulley 9", across above the door to the other side, and over the pulley 10 in the second groove of the latter and down to the same weight 18. The weight 18 is designed to conventionally represent any Anecessary or convenient counterpoise for the doors. For operating the door the'axle of ,the double groove pulley 10, atleast one of whose grooves is adapted for driving engagement of the ca- 1 ble, has rigid with it a large working pulley 2.0, adapted in its groove for engagementof an endless driving cable or chain 21, which extends down :into convenient reach for an operator, who-by meansof it may rotate the lleyr 210, and thereby the double-groove puley 10, in either direction for operating the door,V supplying by hand the small deficiency of weight or counteracting the excess of weight of the counter-poise at different stages `0f the doors movement. Except in details the construction above described is substantinlly the same as that shown in my said ap I guide-tracks, they cause the upper edge of plicntion, Serial No. 149,959. struction, thil door being suspended from the horizontal bar 2i at its hinge connection thonewilh. the pivot-line of such hinge connection being at the outer surface of thc door and thv pivot-limI of the hinge connection between the two sections being at the inner surface of the door. the door tends normally to hang buckled slightly away from the wall or vertical plane in which its inner surface would stand when closed together perfectly at the hinge between the two sections; but a slight inward pressure will straighten the door and thrust its lower edge down -to the Hoor, and upon release the door would immediately buckle outward. the lower edge rising from the Hoor in such action, so that the operator by 4'neans of the chain 21 would readily lift and fold it to elevated position, as seen in Fig. `1. ln order to render the action of the door in closing fully at its lower position automatic, dispensing with the necessity for any assistance by the operator, I provide near the upper end of each guide-,track 12 a cam 23, 4which is in the form of an .upwardly-open hook having an inclined face a't the upper side. The upper door-section has projecting from each margin Vnear the upper edge a pin 24, which is in position to overhang the inclined face of the cam-hook `23 as thedoor descends and to become engaged above and inward of the sloping upper face of said camhook. This engagement should occur after the door has reached nearly its lowest position` the' exact pointvarying with the weight and friction, in view of which the location of the pins may be selected by a little experiment with/each size and weight of door, the difference being due to the varying eifect of the friction of the operating devices and the weight of the door, upon the time in the descent of the door at which the bar 3 commences to descend, and the rate at which it .lescends relatively to the descent of the lower edge of the lower section. When the pins become engaged behind the cam-hooks, as described, it will be seen that the further descent of the bar 3, carrying both sections of the door down bodily, will cause the upper door-section to'be drawn inward toward the wall by the slope of the cani-hooks with which the pins are engaged. For completing the straightening ofthe door by means of its own descent-by gravity operating in. excess of thecounterpoise-I provide the lower doorsection with a hook 25 at each lateral edge near the upper edge or hingeline, such hooks being projected outlaterally suciently to pass beyond the lifting-cables and beingthen bent toward# the wall, so as to travel alongside the guide-track12. The downwardly-turned ends 26 of these hooks are sloped on the face awayfrom the wall, so that engaging behind the pins 27, which project horizontally from the With this conl the lower section of the door to which the hooks are attached to be drawn inward against the wall, and thc weightoi' thedoor in excess of the counterpoisc is designed. to be suilieient to insure close locking ot' the door against the wall by this means. For securing the door in closed position against any attempt to open it any suitable locking` device may be used to hold it down to the ioor or hold it back against the wall4 which will accomplish the saine result.

I claim 1. A warehouse-door comprising two sections hinged together at a horizontal longitudinal line and suspended hingewise by the upper side of the upper section, the lower section and the wall or casing to which the door shuts having one a hook and the other an element for engaging the-hook, the hook having the fice for the encounter of the engaging element slopinginward downwardly for drawing the door in toward the wall as it appreaches the limit of its descent.

2. A warehouse-door comprising two sections hinged together at a horizontal longitudinal line and suspended hingewise by the upper side of the upper section with a limited range of vertical movement at its said upper hinged side, the upper section of the door and the wall or casing to which the door shuts having one a hook and the other an element for engaging the hook, the hook having the face for the encounter of the engaging element sloping inward downwardly for drawing the upper section of the door inward toward the wall or casing as the doordescends within the raige of said vertical movement of its upper Sl e.

A warehouse-door comprising two sections hinged together at a horizontal longitudinal line and suspended hingewise by the upper side of the upper section with a limited range of vertical movement at its said upper hinged sile; an upwardly-open hook secured to the wall or casing to which the door shuts and a` stud projecting from the-upper doorsection overhang-ing said hook in position-to encounter the same when said upper hinged side of the door descends. the face of said hook so encountered being Vsloped downward yinwardly for drawing the upper section of the door inward as it descends.

4. A warehouse-door comprising two sections hinged together at a horizontal longitudinal line and suspended hingewise by the upper side of the upper section with a limited range of vertical movement at said upper hinged side, the upper section of the door and the wall or casingto which it shuts havingone a hook and the other an element for engaging the hook in `the descent of the door within said' range of vertical movement of its upper side, the lower section of the door and the wall or casing having one a hook `and the IDO other an element for engaging the hook as said lower section descends, the hooks having their respective faces which are encountered by the engaging elements' sloping inward downwardly for drawing said door-sections respectively inward toward the wall or casing in their descent.

5. A warehouse-door comprising two sec tions hinged togetherat a horizontal longitudinal line and suspended hingewise hy the upper side of the upper section; means for guiding the lower side of the lower section vertically, said lower section, at a point above its vertically-guided lower sidr` and the wall or casing to which the door shuts. having one a hook and the other an element for engaging the hook, such hook having the face for encounter of the engaging element sloping inward downwardly for drawing the lower section of the door inward toward the wall as it descends.

6. A warehouse-door comprising two sections hinged together at a horizontal longitudinal. line and suspended hingewise by the upper side of theupper section and having alimited range of vertical movement at its said upper hinged side; means for guiding theV lower side of the lower section vertically, said upper section and the wall or casing to which the door shuts having one a hook and the other an element for engaging the hook, the element on the door-section overhanging the element on the wall or casing in position for encountering said element on the wall or casing in the descent of the upper section of the door within the range of vertical movement of Vitssaid upper hinged side, the face of thehook for encounter with the engaging element heing sloped inward downwardly for guiding the door toward the wall or casing as it descends within said range of vertical movement of its upper hinged side.

7. A warehouse-door comprising two sections hinged 'togetherat horizontal longitudinal line, suspended hingewise by the upper side of the upper section and guided vertically at the lower side of the lower section and having iiniited range of vertical movement at its said upper hinged side, said upper and lower sections, the former below and near to its upperhinged side and the latter above andnear to its lower verticallyguided side` and the wall or casing to which the door shuts having cooperating elements for encounter and engagement as the door descends, one of the cooperating elements being a hook and the other a means forengaging the hook; thel hook Y element having its face for eneouiiter with the engaging element sloping downward inwardly for guiding the door-sections inward as they descend after such encounter.

8. A warehouse-door comprising two sections hinged together at horizontal longitudinal line suspended hingewise by the upper side of the upper section, and means for guiding the lower side of the lower section vertically, the pivot-line of the suspending-hinge at the upper side of the upper section being in' a vertical plane outward with respect to the wall or casing from the pivot-iine of the hinge between the two sections, the lower section, at a point above the means for guiding its lower edge, and the wall or casing to which the door shuts having one a hoek and the other an element for engaging the hook as said iower section descends, the hook'having the face for the encounter of said hinged element sloping inward downwardly for drawingsaid lower element inward during the descent.

9. A warehouse-door comprising two sections hinged together at a ,longitudinal horizontal line suspended hingewise at the upper sideof the upper section and having a limited range of vertical movement at its said upper hinged side; means for guiding the lower section vertically at the lower side, the pivot-line of the hinge by which the door is suspended at the upper side being in a vertical plane outward with respect to the wall to which the door shuts from the pivot-line of the hinge be tween the two sections, the upper section and the wall or casing to which the door shuts having one a hook and the other means for engaging the hook in the downward movement of saidnpper hinged side, the face of the hook for encounter with the engaging element being sloped downward inwardly for guiding said upper section in toward the door-casing as it descends. Y

10. A warehouse-door comprising. two sections hinged together atahorizontal longitudinal line and suspended hingewise hy the upper side of the upper section with a limited range of vertical lmovement at said upper hinged side; means for guiding the lower section vertically at the lower side, the pivotal line of the hinge at which the upper section is suspended being .outward with respect to the wall or casing from the pivot-line of the hinge of the two sections` the said upper and lower sections on the one hand and the wall or casing to which they are shut on the other hand having coperatie elements of which one is a hook and the ot er a means of engaging the hook as the sections respectively de-V scend, the face of seid hook for encounter with* the engaging element being sloped downward inwardly to guide said sections inward to the wall or casing in their descent.

In 'testimony whereof I have hereunto set my hand, in the presence of two witnesses, at Chgcago, Illinois, this 15th day of July, A. D. -19

JOHN Eawoon.

IIO 

